When ever I try to build, the game slows down. When I zoom out into space, everything is working smoothly. Sometimes when a building is completed, frames starts popping up out of the planet and the game slows down to a point where every 13sec the game responds for like 4sec then freezes for another 10 to 13sec. When I zoom out to space mode all that stops and the game runs smoothly from space. One more thing. When ever this happens 50/50 the game crashes and the screen goes white with an error code.
This has all been confirmed and has pretty much been around since alpha. The devs are currently working on this, and with the release of beta have been pushing for better performance across the board. This won't all be fixed at once. But with the rate with in which that have been improving it, I'd say you'll see withing a week or two of these small patches.